684046878 has 16 divisors (see below), whose sum is σ = 1369393536. Its totient is φ = 227799000.

The previous prime is 684046823. The next prime is 684046897. The reversal of 684046878 is 878640486.

684046878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 684046878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47248 + ... + 60003.

It is an arithmetic number, because the mean of its divisors is an integer number (85587096).

Almost surely, 2^684046878 is an apocalyptic number.

684046878 is an abundant number, since it is smaller than the sum of its proper divisors (685346658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684046878 is a wasteful number, since it uses less digits than its factorization.

684046878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108319.

The product of its (nonzero) digits is 2064384, while the sum is 51.

The square root of 684046878 is about 26154.2898584534. The cubic root of 684046878 is about 881.1069394852.

The spelling of 684046878 in words is "six hundred eighty-four million, forty-six thousand, eight hundred seventy-eight".